EnterKeyBehaviorProperty (VBA for MS Word 97)

I have created a template form which contain an AutoNew macro which brings up a series of prompted text boxes. I am attempting to modify the EnterKeyBehaviorProperty so that upon depression of the Enter Key, the current text box window closes and the next one opens. In other words, altering the Enter Key function to have the same effect as clicking on the OK button within the pop-up window. I have attempted inserting in different line locations variations on a theme of "Textbox1.EnterKeyBehavior = False" to make the desired Enter Key behavior change. I have not met with success. There are 12 pop-up windows in sequence which I need the EnterKeyBehavior to function to close the window and move on to the next. After the sequence of text box windows, a prompt appears directing the user as to what to do to complete the template form. The code without the EnterKeyBehavior modification is as follows:

<pre>Private Sub TextBox1_Exit(ByVal Cancel As MSForms.ReturnBoolean)
'this event procedure is triggered when the user presses Enter in the textbox
If Me.TextBox1.Value = vbNullString Then
Cancel = True 'don't go anywhere, the textbox is empty
Else
Cancel = False 'we are out of here
Me.Hide 'close the userform, return to main module
End If
End Sub</pre>